The majority of this season's deaths have been linked to swine flu, which first emerged in 2009. The H1N1 strain is known to be more dangerous to young and middle-age adults than other strains of the flu.

Health officials are urging everyone ages 6 months and older to get vaccinated. Those considered at highest risk are those 65 and older, children less than two years old, pregnant women and those with medical conditions like asthma, heart disease and weakened immune systems.

The peak of flu season is between January and March, and the vaccine takes about two weeks after inoculation to be fully effective, according to health officials.